RabbitMQ接受一堆数字Bug

Python发送端用 pika 发送消息

发送代码是这样的：

#!/usr/bin/python
# -*- coding:utf-8 -*-
import pika
import json

credentials = pika.PlainCredentials('ding', 'ding')
connection = pika.BlockingConnection(pika.ConnectionParameters('192.168.0.200',5672,'/',credentials))
channel = connection.channel()

channel.queue_declare(queue='test queue')

msg = 'GG next'

channel.basic_publish(exchange='',
        routing_key='test queue',
        body=msg)
connection.close()

Java接收端是 Spring boot 项目，集成了 RabbitMQ 的包：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>

接收代码是这样的：

@RabbitListener(queues = "test queue")
public void process2(String message) {
    System.out.println(message);
}

运行Python脚本，Java端得到的结果是这样的：

71,71,32,110,101,120,116

结果全是 ASCII码了！之前用Java集成了 RabbitMQ，Java和Java之间是没有这个问题的。于是想到在Java端把 ASCII 码转换为字符串，就写了下面的代码：

@RabbitListener(queues = "test queue")
public void process2(String message) {
    System.out.println(arrayToStr(ascToArray(message)));
}

private String arrayToStr(int[] arr) {
    String res = "";
    for (int i = 0; i < arr.length; i++) {
        res += Character.toString((char)arr[i]);
    }
    return res;
}

private int[] ascToArray(String str) {
    String[] arr = str.split(",");
    int[] resArr = new int[arr.length];
    for (int i = 0; i < arr.length; i++) {
        resArr[i] = Integer.parseInt(arr[i]);
    }
    return resArr;
}

得到的结果正常了：

GG next

正有点开心之际，想到一个问题，中文字符怎么办？一个汉字两个字节，ASCII码可表示不了啊？

于是试验一下Python端发送

msg = 'GG 下一把'

Java端果然出问题了：

GG ￤ﾸﾋ￤ﾸﾀ￦ﾊﾊ

这时我们可以看看 RabbitMQ 给我发送过来的到底是啥，Java端代码变成这样：

@RabbitListener(queues = "test queue")
public void process2(Object message) {
    System.out.println(message);
}

Python发送端发来的是这样的：

(Body:'[B@49d1204c(byte[12])' MessageProperties [headers={}, contentLength=0, redelivered=false, receivedExchange=, receivedRoutingKey=test queue, deliveryTag=1, consumerTag=amq.ctag-Q4Oy_yC5qRoLoxAdu50zaw, consumerQueue=test queue])

Java发送端发来的是这样的：

(Body:'GG 下一把' MessageProperties [headers={}, contentType=text/plain, contentEncoding=UTF-8, contentLength=0, receivedDeliveryMode=PERSISTENT, priority=0, redelivered=false, receivedExchange=, receivedRoutingKey=queue, deliveryTag=1, consumerTag=amq.ctag-o1v48tbAr8mu-pT7HZHvHA, consumerQueue=queue])

居然一个是 byte[] 数组一个是 String这可怎么办？解决代码如下：

import org.springframework.amqp.core.Message;
@RabbitListener(queues = "test queue")
public void process2(Message message) {
    String messageBody = new String(message.getBody());
    System.out.println(messageBody);
}